1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7fbfebde80b51636ee94ff8ec5856eba5affe2d5ce7902dd39ab47809d22b0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b984e703-3c76-481f-8248-f8f44ab90090.json and https://artists.proofprofile.net/proofs/artist/b984e703-3c76-481f-8248-f8f44ab90090.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8c7000ccc8d2475d25380e3ee8264f9cbcaaaf177c856e3e35dfe329ab2997. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITJ501703618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701ce0886ea974c4dc0bf05ad24556e4e21329122c41136b6799d21f09c2e3dd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITB551814986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb08549c7299f60a290513cd13a8fce650f2e75d0d2e94e8aac149fef8661e67. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITKT22000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602cad337eaa9389d5822ab50d4853e64046aa43b9bbcf2c5f148001e32b584c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1638775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827937b20105b18ac5f3f8010936e613387cf10a4f6bb49128ed7848dcbb4279. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1661784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866b895ad6d3985186bf895e86248eff19ec4b3b605770ce74fd9c93d8020312. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1661785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7359b0cd3f4ea8491176ee8b8650430465af6f37dda036b5eb4974b9cff1993. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1661787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e251b8a314b7c0bfaa0f933c5c10a958a32f352d9f90b0e71467b2f0daf9715. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1661788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5299f4b52cd1f55c38e093f516c7e73fd0aa6f0b18bf0765909b499611d74d65. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1661790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf346c40f660e9242856bacdbd89f3a4258dd69c55252eba25d8e63132a15986. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1661791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dc700328d6efb666e86fc4e0ce30b6e7ac42c528179cd03b410832c1cc6245. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1661793.
NO ROCKSTAR (feat. Marte) – Prod. Strage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2be35beb95c164c077dbd939b5be6e19f1f636d1743098e93ca6326a3ebe86c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITB002401508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b5ec81f8f1cf1f4d2b029121d5af23f5d68e38f2416bb7267a493bb7440510. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITB002401516.
VERBATIM (feat. Kkrisna & Johnny Marsiglia) – Prod. Strage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b46aa73db30aa6e397c3a6d1d1e51cfdf5673794986ca3341873a5df86b6b00. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITB002401517.
KAWA (feat. Samuel Heron) – Prod. Strage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7ea64bc3aa9b17a3cae6c540c14aae34f45b7b5ab6207aa9c85d1ab23c702a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITB002401520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93024bab724b7310f99d9dba62fbab90b746cac5a739d0102e336c658cf2823a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITB002401523.